Typewriting machine



Jan. 27, 1931. J. A. B. SMITH 1,790,174

TYPEWRI'IING MACHINE Filed June 25,' 1928 2 Sheets-Shet 1 I NVENTOR.

ATTORN Jan. 27, 1931; J. A. B. SMITH TYPEWRITING MACHINE Filed June 25, 1928 2 Sheets-Sheet 2 ATTOR Patented- Jan. 27, 1931 TYriiwRI'rING- ma mas Application filed June 25,

' This invention relates to 'typewriting machines and more particularly to means for providing an opening or gap between the platen and the front of the paper-table, sufii ciently large to facilitate frontinsert-ion of a pack of work-sheets.

For obtaining a front-insertion opening, means have heretofore-been provided whereby the bottom paper-apron was slidden down away from the platen at the paper-releasing operation, or the paper-table was mounted to be rocked during the paper-release, in

order-to swing the front portionof the apron away from the platen.

Since in standard typewriting machines the extent to whichthe paper-table can normally be displaced is limited by the presence of mechanismybelow and in from} of; the platen, the use of the old devices has given only a limited sheetdnserting opening which; was found not to accommodate a'large-number of work-sheets and carbons.

A feature of the present'invention is the provision of means whereby the paper-apron i of a standard Underwood-machine can be that simultaneously with its aforesaid downward movement there is imparted to it a swinging movement, in order to carry the forward portion thereof a further distance away from the platen, and thereby provider an amplesheet-inserting gap.

The paper-table has at each side down wardly-eXtending hooks straddlingithe feedroll rock shaft, upon which means is mountedto engage said hooks andinove the paperapron dew-n away fromthe platen during the releasing of the feed-rolls.

The extension is pivotally supported on the front feed-r ll-shaft and it is provided with a projection that normally engages a fixed abutment, which is so arranged that i923. serial No. 237,935.

during the downward movement of the ex tension with the feed-rollsan-d papertable I the abutment will be effective to swing the extension about its pivots, cau'singthe front portion of the extension to be moved further away from the platen. V

The front wing-scale also has its upper portion bent outwardly and arranged to cooperate with the front of the auxiliary paper-apronto form a furtherextension thereof. The platen isshifted to its upper-case position, and then the feed-rolls, together.

withthe paper-table and its extension, are

released, The displacement of the auxiliary apron causes it to engage and swing the wing-scale away-fromgthe ,platen .to a posi; tion where the top ofxthe scale directly underlies the top of the usualyribbonspool sofas to produce a liiarginium sheet-inserting mouth fully equal to ,the distance between the ribbon-spool and the platen, thus enabling an unusually thick pack of sheets to be readily I insertedlat the front ofthe machine.

Other'features and advantages will hereinafter appear; 7 r In the accompanying drawings,

ing a portion of a typewriting machine. with the carriage shifted to its upper-case position and the feed-rOlIsand the papertable moved'away from the platen ,;for the insertion of apack of sheets. 1 I

Figure Qis aperspective viewofa part of a typewriter-carriage, to clearly showthe feedroll mechanism together with the construction of my invention. I

Figure 3 is a view similar to Figure 1 with thefcarriage in its upper-case position and the feed-rolls and the paper-table in their .nQr ale -e ti Peti on -V M t Figure ,view similar to iF igure g but showing the carriage in its time Figure5is a front view, ineleyation, showing a portion of a typewritingmachine with thecarriage ,moved to its extreme right for sheet. inserting, and ',parts of the machine be ing broken away or omitted ;to show ithje invention ,inore clearly.

Figure 1 is a side view, in elevati'on showlowerase posi- I a. B, siu r i; or STAMFORD, comv'ncriour, assie voii TO Unn nwoop ntLio'rr men s-a COMPANY, or NEW YOR N. Y., A CORPORATION or nnnnwann stationary main frame 15.

nl 1 f --w rs ,0 Wa ts or eat p atei. lame are counccw Figure 6 is a fra mentary plan View of the str cture shown in Figure 5.

l iguie 1S a iilaiitnllflftslC vie 01 parts shown in Figure 1, but showing a pack of sheets being inserted with the wing-scale omitted and the platen in its lower-case pos tion.

c In an Underwood typewriting machine, types 10 strike against a platen 11 mounted in 4 19, which," through r2don the platenvtertically upward.

(13 frame, mo i The platen-name is guider in its vertical movement by the usual guide-arms 21.

Front and rear feed-rolls 22 are mounted on shafts and 25', res ectively, jou'rnaled in arms 26 of hell-crank s? rotatably mounted on the cross-shaft 17. Depending'arms 28 of said bell-cranks disposed on opposite sides of a rock shaft 29, ournaled in depending hanger members 30' fixed to the crossshaftlT. Y 1 k The rock-shaft 29 has cutouts 31- on its front and rear sides forming flat portions for engagement with the depending arms 28, to. cam the arms 28 outwardly and swing the feed-rolls downwardly against the tension of pressure-springs 23, upon rotation of the shaft 29 caused by the operation of a release lever 32 pivotally mounted on one of the end plates 12 of the platen-frame 13 and connected to the rock-shaft 29 by a link 33. The rock-shaft 29 is prevented from horizontal movement by pins 34 fixed thereto and tending through slots 35 in the hanger members 30. i

A paper-table 36, extending downwardly and forwardly and having its lower portion curved under and around the platen, is slidably mounted on the cross-bar 16 by means of a pair of slots 37, throughwhich screws 38 project, and are threaded into the cross-bar 16. The paper-table is held in its normal position in close proximity to the platen, by means of springs 39, at the rear of the papertable. The springs are connected atone end to said screws 33 and at their other endto pins 40 fixed on said papertable.

The operation of the feed-roll-release lever 32 when releasing the feed-rolls actuates means to simultaneously slide the paper-table 36 downwardly and forwardly, toprovide a front-sheet-insertion opening between the table and platen. Said means includes a pair of downwardly-extending hooks 41 fixed to the paper-table 36, one at each side thereof,

and having their lower ends or curved portions 42 straddling the-rock-shaft 29'to guide position by a shift-key-lever them together with the paper-table in a fixed l course during their sliding movement away from and towards the platen.

Each curved portion 42 is provided with a projection '43 extending into the pathof a flat pertion44 of a collar45 rigidlymounted on the rock-shaft 29, to rotate therewith when the latter is operated to'release the feed-rolls. e flat portions 44, during their rotation,

n -he platen and table. The space, although limited by the mechanism below "the platen, is probably sufficient to' mit easy front insertioirof a single sheet, but" when desired to front inserts'evsheets in the form of apack, difficulty is encountered in threading all the bottom edgesof the pack into said opening.

order to overcome this difficulty an auxiliary table 46 is proyided, which forms an extension atthe front of the paper-table 36.

Said extension is swingably mounted through braclrets'47, being fixed to said extension, and rotatably supported at the ends of thefront feed-rell-shaft 24. The paper-table and the extension are provided with interleaved curved fingers 48 and 49, respectively. The fingers are so arranged as to always form a smooth surfa'ce'be ween the table and the extension regardless of their positions, so that the leading edges of the paper may passfreely and uninterruptedly from one table to the other during theinsertion of the sheets.

The brackets 47 of the extension 46 are each provided with a projection 50 lying in the path of a stationary abutment 51 fixed tot-he cross-shaft 17, so that during the movement of the apertable'and feed-rolls away from the platen,-the auxiliary paper-table, being mounted on the front feed-roll-shaft, is also swung away from theplaten, and since the projections 50 are in contact with the fixed stationary abut'ments 51 during the auxiliary paper-table.s downward movement with the feed-rolls, the brackets and extension will'berotated about the feed-roll-shaft 24 against the tension ofreturning springs 52 attached'at one end to the extension 46, and at the other ends to pins 53 fast on the stationaryhanger members 30. l

By this means the front of the extension is swung down,-away from the platen, with the feed-rolls, and also swung further away from thep-latenthrough its rotation about the feed-roll-shaft, caused by the fixed abutments 51 acting on the projections 50. It can readily be seen that in thismanner a large opening is provided. between the platen and the front of the auxiliary paper-table, to facilitate the front insertion or threading of a pack of sheets 63 into said opening.

A wing-scale 54 may be employed to cooperate with the paper-table 36 and its exten- -'the" projecti ons 43 andipull the hooks down which 111* turn' sl de'the aa'oer-table a 1 .a a

downwnh them, thus creating a space be- 7 to the right sionti, in forming an extremely largesheetinisertingl opening in front of, the-platen. The scale 54 is swingably supported in brack ets 55 and56. The bracket 55 isrmounted on a type-barse ment 5'7, while thebraclret 56'is supported. by a second bracket 58 fixed to the" main frame 15. The scale 5-t extends outs wardly from the right of a type-bar guide 59 a distance substantially the same as the length of the platen, so as to co-operate with its entire ength when the carriage is moved 5). 'The scale 54 is normally pressed to-v wards the platen by springs 60. 'l/Vhen it is desired to front insert a pack of sheets v6 3 into the machine, the carriage 1s first returned to its extreme right and theplaten shifted and locked in its upper-case position, where it can be left until the beginning of typin which usually starts with a capital letter.

The shiflng of the platen at this. time raises the platen-frame up and brings the front of the auxiliary table closer to the top I of the shiftless parts in the front of the platen, including a ribbon-spool 61, which is mounted closely adjacent the frontof the platen. The platen shifting also positions the auxiliary table toco-operate withan outwardly-extending flange 62 ofthe wing-scale 54, so that when the feed-rolls, paper-table and auxiliary paper-table are moved down away from the platen, the last-mentioned pa per-table will engage the wing-scale and swing it forwardly. away from the platen, against the tension of said springs 60 ,(see Figure 1).

In this position the flange 62 forms a con tinuation of the auxihary table 46, which ter nitiates at the edgeo f the ribbon-spool 61. The pack of sheets 63 may now be inserted in the space between the ribbon-spool andthe platen and guided down underneath around to the rear of the platen by means of the flange 62, the auxiliary table 46 and the regular paper-table 36.

The sheets may then be positioned in the;

machine and the rock-shaft rotated throu h the lever 32 to return the feed-rolls to their normal effective position and simultaneously return the auxiliary table and wing-scale by means of their springs 52 and 60, respectively. The rotation of the shaft 29 moves the flat portion M away from the projection 43 and permits the paper-table through the springs 39 to be pulled up to its position'close to the platen, at which time the sheets maybe typed.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

' Having thus described my invention, 1 claim:

1. In a typewriting machine, the combination with a platen-frame, a 'revoluble platen in said frame, lower feed-rolls engag ing against said platen and a feed-roll refor sheet inserting (see Figure adjacent the front of said. paper-table and mounted independentlythereof, and means additional to said paper-table and extension,

to simuitaneously displace, both said pape table and said extension in thesame Clll'eCb away from the "platen 1 during the "releas.

movement ofsaid feed-rolls. o

2. In a typewrltmg machine, the combi means, additional to said paper-table and tension, to simultaneously slide said papertable and extension downwardly and forwardly and swing said extensionaway from the platen during the releasing operation of the feed-rolls to provide .asheet-inserting opening between the platen and paper-tabies.

3. In a typewriting machine, the combination with a platen-frame, a revoluble platen in said, frame, lower feed-rolls engaging against'sald platen afeed-roll release-lever, of a rear paper-table slldably mounted on said platen-frame and extending downwardly and forwardly around said platen closely adjacent thereto,-means co-operating with theslidablemounting of saio table for guiding it forwardly and downwardly along a fixed course. to space it from the platen, an

lease-lever, of a rear paper-table slidably J mountedon said platen-frame. and-extending downwardly and forwardly around said platen closely adjacent thereto, an extension auxiliary table forming a continuation of saidpaper-table-and movable forwardly and downwardly with the latter, means to move said tables simultaneously with the releasing operation of thefeed-rolls, and means effective during said movement to swing said auxiliary table about its pivot-bearingsto provide a wide'sheet-inserting openingv at the fr0nt ofthe platen. a I

4. In a typewriting machine, the combination with a platen-frame, a revolubleplaten in said frame, lower front and rear shafts holding feed-rolls againstsaid platen and a feed roll release mckshaft, of a rear papertable slidably mounted on said platen-frame and extending downwardly and forwardly around said laten closel 1 ad'acent thereto means co-operating with the slidablemount- 'ing ofsaidtable for guiding it; along a fixed course to space it from the platen, papertable extension swingably mounted on the frontfeed-roll shaft, and means for moving the paper-table, the extension and the feedrolls away from the platen upon operation of said rock-shaft.

5.. In a typewrlting machine, the combination with platen-frame, a revoluble platen in said frame, lower frontand rear shafts holdingfeed-rolls against said platen and a feed-roll release rock-shaft, of a rear papertahle slidably mounted on said platen-frame and providing a wide opening between the platen and the paper-table for the front 111- sertion of a pack of sheets.

In a typewriting machine, the combination witha platen-frame, a revoluole platen in said frame, lower feed-rolls engaging against said platen and a feed-roll releaselever, ofa rear paper-table slidaloly mounted on said platen-frame and extendingdOwnwardly and forwardly aroundfsaid platen closely adjacent thereto, meansto displace and uide said table forwardly and downwardly from the platen, aseparate pivoted auxiliary table mounted in line with and forming an extension at the front of said paper-table, and means operating simultaneously with said paper-table displacing means to move said extension downwardly and forwardly and swing the same away from the platen.

7. In a typewriting machine, the combination with a platen-frame, a revoluble platen.

in said frame, lower feed-rolls engagingagainst said platen and feed-roll releasing mechanism, of a rear paper-table sli'dahly mounted on said platen-frame and extending downwardly and forwardly around said platen closely adjacent thereto, means to displace and guide said table forwardly and downwardly from the platen during the res leasing operation of said feed-rolls, a separate pivoted auxiliary table mounted in line with and forming an extension at the front of said paper-table, and meanspperating simultaneously with saidpaper-table displacing means and controlled by said feed-roll mechanism to swing said extension away from the platen.

8. In a typewriting machine, in 'combina tion, a platen-frame, a platen revoluble in said frame, a shaft holding lower front and rear feed-rolls against said platen, a rear 1 paper-table slidably mounted in said platenextension,

a an a mounted in saidplaten-frame and extending paper-table and swingably mounted on said front feed-ro'llshaft, a rock-shaft forreleas- ,ing said feed-rolh'andmeans operable by said roclnshaft during the feed-roll releasin o eration to displace said a er-table and t: L p

extension away from the platen.

9. In a typewriting machine, 1n combinatioina platen-frame, a platen revoluble in said frame,'a shaft holding lower front and rearfeed-rolls against said platen, a rear paper-table shdably mounted 1n said platenframe, and extension at the front of said paper-table and swingably mounted on said front feed-roll shaft, a rock-shaft for releasing said feed-roll, and means operable by send rock-shaft during thefeed-roll releasing operation to slide said paper-table forwardly and downwardly away from the platen and simultaneously swing said extension away from the platen to provide a gap for facilitating the front insertion of a pack of worksheets.

10. In a typewritingmachine, in combination, a platen frame, a'revoluble platen in said frame, lower front and rear shafts carrying feed-rolls, a cross-rod, arms pivoted on said rod and supporting the feed-roll shafts, a rock-shaft for swinging said arms on said cross-rod to move said feed-rolls toward and from the platen, a rear paper-table downwardly and forwardly around said platen, a separate pivoted auxiliary paper table mounted in line with and forming an extension at the front of said paper-table and mounted for pivotal movement on saidfront feed-roll shaft, and means to rock the auxiliary paper-table toward and away from said platen with said feed-rolls.

11. In a typewriting machine, in combination, a platen-frame,-a revolulole platen in saidframe, lower front and rear shafts carrying feed-rolls, a cross-rod, arms pivotedon said rod and supporting the feed-roll shafts, a rock-shaft for swinging said arms on said cross-rod to move said feed-rolls toward and away from the platen, a rear paper-table slidaloly mounted in said platen-frame and extending downwardly and forwardly around said platen, means for automatically sliding said paper-table away from said platen'during the releasing of the feed-rolls, and an extension at the front of said papertable and mounted on said front feed-roll shaft to move toward and awayfrom said IOU on said cross-rod to move said feed-rolls toward and away from theplaten, a rear paper-table; mounted in said platen-frame andextending downwardly and forwardly around said platen, an auxiliary paper-table at thefront of said. table and mounted on said feed-roll shafts from the platen with said feed roIls, a pivoted wing-scaleat the front of the platen,

and a flange on saidwing-s-cale to form" a continuation of saidauxiliary paper-table when said platenframe is its upper-ease position and said paper-tables displaced.

13.- In a typewriting mach1ne,'1n comblnation, platen-frame, a revoluble platen in said frame, platen-shifting mechanism for raising said platen to an upper-casetypingposition, lower front and'r'earjshafts carrying feed-rolls, across-rod, arms pivoted on :7 said cross-rodand supporting said feed-roll shafts, a rock-shaft for swingingsaid'arms on said cross-rod to move said feed-rolls toward and away from theplaten, a rear papertahle mounted for displacement ll'LSitlCl platen-frame and extending downwardly and fori wardly around said plateman auxiliary pa-V per-table at the front of said table and mounted'on said feed-roll shaft to move to g ward and away from the platen with said feed-rolls, a pivoted wing-scale at the front of the platen, a flange on said wing-scale to form a continuation of said auxiliary pa ertable when said platen-frame is in-its upp'er- Jcase position and said paper-tables displaced,

and means to move';-said scale toward and away from said. platen with said paper tables,

14. In atypewriting inac'hine,the combination with platen-frame, a. revoluble platen mounted in said frame, lower ifeedrolls bearing against saidp'laten and'a feed-V roll releasing mechanism, of paper-deflecting means, including arear-paper-table extend-- ing downwardly and forwardly around said platen and an aux liary paper-table independent of the rear paper-table adjacent the, [front of said rear paper-tabie, and means 1 operable during the releasing of said feedrolls to move said paper-table and extension downwardly and forwardly away'from the platen to provide an opening for the front insertion of a pack of'sheet 15. In a typewriting machinefthe combi nation with a platen-frame, a rev'oluble;

form a continuation thereof, and means'op-f erable during the releasing-0f said feed-rolls to move toward and away ing; the movement of W in de an: enlarged opening at the: front of" the cross-rod to -move1-said:

away-from the platen, rear paper-table 's-lidalolv-"mounted said pla-ten-frame and extending downwardly ran, 1 extension around said toxemove saidr papei'etable, extension 1 and wingsealezea way "fromtrthe airincrease'd fr9ntopening for" ora ackefisheets. i 16.: In aftypewri-ting machin e,3 1ncombinati'en, a platen-frame, a revolublejplaten -in rying T feed-rolls, a cross rod, arms pivoted on said rod and supportingthefeedroll sha-fts,a;rock-sjhaft for swinging said arms platen to provide the insertion r megiower front and rear shafts car'- on said cross-rod to move said. feed-rollstoward: and away fromtheplaten, a rear paper'- 'Q' downwardly and forwardly .aroundisaid platen' platen durin g' the releasing. of the feed-rolls,

I leans for, automatic ally i slidin -saidzfl; 'pa per+tablef away from said a table sndablygmountedj in said platenrframe and extend -'an-extension at the front ofsaidpaper-table, I

brackets fixed to: said extension and swing-- ,a y i-mountedf on saidu front feed-roll shaft to" move: toward and awa y fromfsaid platen With: saidi-feed=rolls, and-projections on said brackets engagingTfi-xed abutment-s to, swing said extenslonjabout sald feed-roll-shaft d-ur-Q said. feed-rol'lsxto "proplatenfor the insertion Ofa' pack of sheets.

' 17;. ;In a. typewriting machine-Yin combination, aplatenframe airevoluble, platen in frame, :lower front and rear 'shafts Cal's r :ng feedarolls,'afcross rod, arms'pijvotedzo'n :rod fandjsupportin'g the feed-roll shafts,

a o-un d saidplaten, means for automatically ding said ;paper'-table away; fromf 'said .laten: fdur n-g theiireleas ng of thefeed-rolls,

at the front of said'papentable, 1 brackets fixedlto saidlextensiongandj swingiock-ishafft fon s'wingingssaid arms on said:

feed-rolls towardandf v and forwardly i alilvkmoiintje' d on saidi'front feed roll shaft to move toward and away from said platen with said; feed-rolls, projectionson said brackets engaging fixed 'abutrnents to swing extension about's'aid feed-roll shaft durmgthe movement of said feed-rolls, and means at the frontYof-said extension to 00 operate therewith in forminga further 'c ontinuation" of said extension when displaced from the platen to pr'ovidean enlarged-open in at th'efront of the platen for the insertion of a pack of sheets.

18. In a typewriting machine, incombinae tion, a platen-frame, a revoluble platen in said frame, lower front and rear shaftscarrying feed-rolls, a cross-rod,'arms pivoted on said rod and supporting the feed-roll shafts, a rock-shaft for swinging said arms On said cross-rod to move'said feed-rolls toward and away from'the platen, a rear paper" table slidably mounted in said platen-frame and extending downwardly and forwardly around said platen, means for automatically sliding said papers-table away from "said platen during the releasing ofthe feed-rolls, 'nan extension at the front of s'aid paper-' table; brackets fixed to said? extension and swingably mounted on said front feed-roll v shaft "to, nlo ve'toward and away from said platen with said feed-rolls; projections on the platen by said extension.

said brackets engaging fixed abutmentsto swing said extensionabout said feed-roll shaft duringthe movement of saidfeed-rolls;

and means at the front of said extension to cooperate therewith in forming a further continuati'on of said extensionwhen displaced 1 from the platento provide an enlarged open- 15 p H 013;: ack of sheets, said meansincluding'a' swingable wing scale having its upper end at the front of the platen for the insertion flared outwardly and swinga ble' away from -'19. In a typewritlng machine, the cornbination with a platen frame," a 'revoluble platen in saidframe,'a rear paper-table, lower front and rear shafts,-feed-rolls held thereby against said platen, and a feed r'oll-release rock-shaft, of a paper-deflector pivoted by and swingable on thefront' feed-roll shaft, and means-for moving the paper-deflector operation of said rock-shaft; i

20;In a typewritlng machine, the Comand the feed-rolls away from the platen upon, 1

hination with a platen-frame, a revoluble I platen in said frame, a rear'paper-table; 7 lower front and rear'shafts, feed-rolls held" thereby 'againstsaid'platem and a feed-roll release roek-shaft', ofapaper-deflector f0r1n H in a'c'ontinuation. of the upper surface of said table, said deflector heing solely-jsup portedby said front feed-r011 shaft; pivoted by and swingable on the frontfeed-roll shaft, and means for moving the paper-deflector and the feed-rolls away from the platen npon 'operat-ion of said rock-shaft;

JESSE A. 

